Check out information on the Maritime Cabotage Task Force at http://www.mctf.com/. Basically, they want foreign-flagged ships like Celebrity, Princess, RCI, HAL, etc. to spend at least 48 hours in a foreign port when they are sailing Hawaiian cruises. Apparently, there is a requirement in the Passenger Vessel Services Act. However, they are only asking that this rule be enforced for Hawaii. (Sounds like favoritism to NCL-America to me.)